According to TMZ, police are raiding Charlie Sheen's Beverly Hills' home in a "pre-planned raid" tonight:

Sources tell us the LAPD has been conducting an investigation into criminal activity — possibly drugs or weapons. And someone who is at the house tells us cops may be attempting to put Charlie on an involuntary — 5150 — psychiatric hold.

LAPD confirms they're at the house. Sheen just announced a couple of live shows. So, bright side: The inevitable awfulness of these shows is now the least of his problems.

Update: or... maybe not? Charlie Sheen just tweeted: "all good here on homefront. all reports are false. I'll explain more very soon." (Although you can clearly see the police in this live helicopter camera over Sheen's house.)